InputTracer: Trace resolved key repeat count during dispatch

Since the repeatCount in KeyEntry is mutable, it can change after an
event is traced, which is not ideal.

Until we change this behavior, we should trace the resolved repeat count
during dispatch to account for changed repeat counts.

Bug: 210460522
Test: atest inputflinger_tests
Change-Id: I86cdb2cbbd77b7bb834b9d8e66176837c113c1ca